YL-DIM DC insulation monitoring device-Global supplier

No. 1155 Caotan 10th Road, Weiyang District, Xi'an City, Shaanxi Province, China (Zhichao Innovation Space)

▍ brief↴

　　Insulation monitoring device for DC systemIt is a new generation of DC power system insulation monitoring device developed based on the new power industry standard "DL/T856-2013 Technical Conditions for DC Power System Insulation Monitoring Device" and combined with the requirements of the State Grid Corporation of China's "18 Major Anti accident Measures for Power Grid".

　　YL-DIMDC insulation monitoring deviceCapable of accurately measuring AC surge voltage, bus voltage, positive and negative bus to ground voltage, accurately calculating positive and negative bus insulation resistance, and insulation resistance of each feeder branch, and quickly selecting feeder branches with insulation reduction or grounding faults;DC insulation monitoring deviceIt has an AC crossover alarm function and can select AC crossover fault branches, and has a DC crossover alarm function and can select DC crossover branches,DC insulation monitoring deviceEquipped with sensor zero point correction function and compatible with multiple sensor interfaces. It has multiple automatic startup and line selection functions such as communication intrusion, insulation alarm, pressure difference alarm, timing, and resistance change. The fault disappearance alarm signal can automatically reset.

▍ Functional Features↴

Real time monitoring of DC bus voltage, positive and negative bus to ground voltage, positive and negative bus to ground AC voltage, positive and negative bus to ground insulation resistance, and branch to ground insulation resistance data, and visually displaying them on the device display screen;

★equalDC SystemWhen the following faults occur, this product should be able to quickly, accurately, and reliably operate and issue insulation fault alarm information:

a) Single pole grounding and insulation reduction;
b) Single pole multi-point grounding and insulation reduction;
c) Grounding and insulation reduction of two poles with the same branch and resistance;
d) Grounding and insulation reduction of two poles with different resistance values in the same branch;
e) Grounding and insulation reduction of two different branches with the same resistance value;
　　f) Grounding and insulation reduction of different branches with different resistance values at both poles;

★When the insulation resistance of the DC system to ground is less than or equal to the warning value, this product can accurately warn and automatically activate the branch line selection function.

★When the bus voltage of the DC system is abnormal and the deviation of the positive and negative bus to ground voltage is too large, this product can accurately alarm, and the alarm threshold value can be set.

★DC crossover alarmWhen a DC crossover fault occurs in the DC system, this product can issue a DC crossover fault alarm message and accurately select the faulty branch.

★Communication power surge alarmThis product can monitor AC intrusion and set an AC intrusion threshold alarm value. When an AC surge fault occurs in the DC system with an effective value exceeding the alarm value, this product can issue an AC surge fault alarm message and display the amplitude of the AC voltage entering, selecting the faulty branch of the AC surge.

★Voltage deviation compensation functionWhen the ratio of the positive and negative bus to ground voltage of the DC system exceeds the protection misoperation risk factor of 1.222, the product should be able to restore the DC system to a balanced state through the ground voltage deviation compensation bridge.

★DC insulation monitoring deviceIt has a self checking function. Every morning at 9:00, the device automatically starts the self checking function, without the need for regular calibration. It can detect various faults of the device at any time and give alarms, which can also reduce operation and maintenance costs.
a) Balance bridge resistance open circuit;
b) Detect open circuit of bridge resistance;
c) Communication interruption;
d) The selection module is disconnected;
e) Transformer disconnection;

★The DC insulation monitoring device has multiple start-up modes to start the detection bridge and measure the ground voltage and insulation resistance of the positive and negative busbars in real time.
a) The product will start automatically upon startup
b) Timed start
c) Positive and negative bus to ground voltage deviation startup
d) Manually start
e) Power off startup;

▍ TECHNICAL INDEX↴

1Measurement of positive and negative insulation resistance：0--999.9KΩ
2Measurement range of bus voltage：80%--130%Un, Error ± 1%
3Bus to ground AC voltage measurement：0--242V, Error ± 5%
4Measurement range of busbar to ground voltage：10%--130%Un, Error ± 1%
5a bus or bus barinsulation resistancemeasuring rangeWhen Ri<10k Ω, display the specific value
10K Ω≤ Ri ≤ 60K Ω Error ± 5%
60K Ω≤ Ri ≤ 200K Ω Error ± 10%
200K Ω≤ Ri ≤ 999K Ω Display specific values
6Measurement accuracy of branch resistance： When Ri<10k Ω, display the specific value
10K Ω≤ Ri ≤ 100 K Ω Error ± 20%
100K Ω≤ Ri ≤ 200 K Ω Display specific values
7Grounding alarm resistor setting1-120K Ω, step size 1K
8Bus voltage over limit alarm setting1- ± 20%, step size 1%
9Voltage level of DC system：24V、48V、110V、220V
10Scope of working power supply： AC220V±20%；
11Equipment usage conditionsEnvironmental temperature: -10 ℃ to 55 ℃;
Humidity: ≤ 90%;
Atmospheric pressure: 80-110Kpa;